Synthesis of magnesium titanates by mechanochemical method

Filipović, Suzana; Obradović, Nina; Pavlović, Vladimir B.; Marković, Smilja; Mitrić, Miodrag; Mitrović, Nebojša

doi:10.5937/tehnika1405727f

Cited by 1 publication

(1 citation statement)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Importantly, Fe (110) and BaTiO 3 (100) planes are a relatively close match in terms of lattice constants (a mismatch is only about 1.4%), which allows layer-by-layer epitaxial growth of Fe/BaTiO 3 multi-layers with no misfit dislocations. Mechanical activation is a wellestablished preparation route for various titanate based based electroceramics [11][12][13][14][15][16][17]. At higher Fe:Ba ratios, barium hexaferrite BaFe 12 O 19 , an M type hexagonal ferrite, is usually formed, which, like other ferrite materials, has been used as a permanent magnet for electronic and microwave applications [18][19][20][21][22], due to its large uniaxial magnetic anisotropy [23].…”

Section: Introductionmentioning

confidence: 99%

Influence of mechanical activation on functional properties of barium hexaferrite ceramics

Kosanović

Blagojević

Maricic

et al. 2018

Ceramics International

View full text Add to dashboard Cite

Barium hexaferrite ceramics were prepared using mechanically activated mixtures of iron and barium titanate. The 60:40 mass% Fe:BaTiO 3 powder mixtures were mechanically activated for different times (100-240 min) and sintered at 1100 and 1200 o C in order to determine the influence of mechanical activation of the precursor on the magnetic and dielectric properties of the resulting barium hexaferrite ceramics. The final product contained 84-89 mass% of Ba 2 Fe 22.46 O 38 Ti 1.54 phase, with higher content corresponding to longer mechanical activation of the precursor. XRD and Raman measurements indicated that the remainder of the sample consists of leftover BaTiO 3 and hematite, which was formed by the oxidation of iron during mechanical activation and sintering in air. Magnetic properties of samples sintered at 1200 o C are superior to those sintered at 1100 o C, which can be attributed to higher Ba 2 Fe 22.46 O 38 Ti 1.54 phase content. The position of the Curie temperature in 350-420 o C temperature region is consistent with 0.8:1 ratio of Ti to Ba. Maximum magnetization was observed for samples activated for 120 min. Dielectric properties of samples sintered at 1200 o C showed a dependence on frequency, with a significant drop in relative permittivity with an increase in

show abstract